:root{--bg:#f2f3f8;--bg-soft:#e9ebf3;--card:#fff;--sidebar:#fff;--fg:#131722;--fg-2:#5d6474;--fg-3:#9aa1b5;--hover:#eef0f7;--active:#e3e6f2;--border:rgba(19,23,34,.08);--composer:#fff;--user-bubble:#fff;--asst-bubble:#fff;--accent:#2f5bff;--accent-ink:#fff;--accent-soft:rgba(47,91,255,.1);--btn-ink:#fff;--btn-bg:#131722;--danger:#d33f3f;--ok:#1d9e57;--ring:rgba(47,91,255,.35);--shadow:0 10px 34px rgba(23,30,60,.1);--shadow-sm:0 2px 10px rgba(23,30,60,.07);--r-sm:10px;--r-md:14px;--r-lg:20px;--r-pill:999px}[data-theme=dark]{--bg:#101014;--bg-soft:#1a1a20;--card:#17171d;--sidebar:#141419;--fg:#ececf1;--fg-2:#a7abb8;--fg-3:#6f7482;--hover:#22222a;--active:#2c2c35;--border:hsla(0,0%,100%,.09);--composer:#1e1e25;--user-bubble:#2f5bff;--asst-bubble:#1e1e25;--accent:#4d7cff;--accent-ink:#fff;--accent-soft:rgba(77,124,255,.16);--btn-ink:#101014;--btn-bg:#ececf1;--ring:rgba(77,124,255,.45);--shadow:0 10px 34px rgba(0,0,0,.5);--shadow-sm:0 2px 10px rgba(0,0,0,.4)}*{box-sizing:border-box}body,html{height:100%}body{margin:0;background:var(--bg);color:var(--fg);font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,sans-serif;font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;overscroll-behavior-y:none}button,input,select,textarea{font:inherit;color:inherit}button{cursor:pointer}:focus-visible{outline:2px solid var(--ring);outline-offset:2px}.shell{display:flex;height:100dvh;overflow:hidden}.sidebar{width:288px;flex-shrink:0;background:var(--sidebar);border-right:1px solid var(--border);display:flex;flex-direction:column;padding:14px 12px;gap:2px;overflow-y:auto}.main{flex:1 1;display:flex;flex-direction:column;min-width:0;position:relative}.topbar{display:flex;align-items:center;gap:6px;padding:8px 12px}.messages{flex:1 1;overflow-y:auto;padding:6px 16px 16px;scroll-behavior:smooth}.narrow{max-width:780px;margin:0 auto;width:100%}.welcome{min-height:100dvh;flex-direction:column;padding:28px 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.tr{position:absolute;inset:0;background:var(--active);border-radius:var(--r-pill);transition:background .15s;pointer-events:none}.switch .tr:after{content:"";position:absolute;width:16px;height:16px;border-radius:50%;background:#fff;top:3px;left:3px;transition:left .15s;box-shadow:0 1px 3px rgba(0,0,0,.3)}.switch input:checked+.tr{background:var(--ok)}.switch input:checked+.tr:after{left:19px}.toolbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px;align-items:center}.toolbar .field,.toolbar select.field{width:auto}select.field{-webkit-appearance:auto;-moz-appearance:auto;appearance:auto}.menu-btn{display:none}.bottom-pad{height:0}@media (max-width:820px){.sidebar{position:fixed;top:0;bottom:0;left:0;z-index:50;transform:translateX(-105%);transition:transform .22s ease;width:min(310px,86vw);border-right:0;box-shadow:var(--shadow)}.sidebar.open{transform:none}.menu-btn{display:inline-flex}.messages{padding:2px 12px 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